As the name suggests, a persuasive essay is about convincing. Convincing the reader to agree with what you stand for can sometimes be an uphill task because other people are also trying to get the reader to agree with them. Therefore, it is important to research on the topic of study and getting to understand both sides of the coin before deciding which side you are going to take.
In persuasive writing, contentious topics are common. It is therefore important to have all the points flowing in a systematic manner so as to be able to sway the reader to your side. One sure way of catching the attention of the reader is by accepting that the opposition is right to some extent, and then using strong evidences to counteract your statement.
It is also important to have an introduction that is captivating and this helps to quickly catching the attention of the reader, and then using your points and evidences to sway the reader to your side.